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65 lines
2.1 KiB
Text
65 lines
2.1 KiB
Text
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#!/bin/bash
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#
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# Munin plugin to monitor free space in MySQL's InnoDB tablespace.
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# Mostly useful if you use InnoDB on a block device, or if you for
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# some reason don't want to do autoextend on the last file.
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#
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# 2007-03-18 Stig Sandbeck Mathisen <ssm@fnord.no>
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#
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# Configuration parameters for /etc/munin/plugin-conf.d/mysql_innodb,
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# if you need to override the defaults below:
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#
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# [mysql_innodb]
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# env.mysqlopts - Options to pass to mysql (host, username, password)
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# env.warning - Generate a warning if free space goes below this level
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# env.critical - Generate a critical if free space goes below this level
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#
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# For security reasons, this plugin uses its own schema with a simple,
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# empty table using the InnoDB engine.
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#
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# You need to run this to get this plugin to work:
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# mysql> CREATE DATABASE munin_innodb;
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# mysql> USE munin_innodb
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# mysql> CREATE TABLE something (anything int) ENGINE=InnoDB;
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## Tunable parameters with defaults
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MYSQL="${mysql:-/usr/bin/mysql}"
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MYSQLOPTS="${mysqlopts:---user=munin --password=munin --host=localhost}"
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WARNING=${warning:-2147483648} # 2GB
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CRITICAL=${critical:-1073741824} # 1GB
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## No user serviceable parts below
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if [ "$1" = "config" ]; then
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echo 'graph_title MySQL InnoDB free tablespace'
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echo 'graph_args --base 1024'
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echo 'graph_vlabel Bytes'
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echo 'graph_category mysql'
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echo 'graph_info Amount of free bytes in the InnoDB tablespace'
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echo 'free.label Bytes free'
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echo 'free.type GAUGE'
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echo 'free.min 0'
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echo 'free.warning' $WARNING:
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echo 'free.critical' $CRITICAL:
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exit 0
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fi
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# Get freespace from mysql
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freespace=$($MYSQL $MYSQLOPTS --batch --skip-column-names --execute \
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"SELECT table_comment FROM tables WHERE TABLE_SCHEMA = 'munin_innodb'" \
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information_schema);
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retval=$?
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# Sanity checks
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if (( retval > 0 )); then
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echo "Error: mysql command returned status $retval" 1>&2
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exit -1
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fi
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if [ -z "$freespace" ]; then
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echo "Error: mysql command returned no output" 1>&2
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exit -1
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fi
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# Return freespace
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echo $freespace | awk '/InnoDB free:/ {print "free.value", $3 * 1024}'
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